Filled-sack-sewing apparatus



F. W. OSTROM AND I. F. WEBB.

FILLED SACK SEWlNG APPARATUS.

APPLICATION FILED FEB. 3, 1918.

1,396,048. Patented Nov. 8,1921.

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FILLED SACK SEWING APPARATUS.

APPLICATION FILED FEB. B, 1918.

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APPLICATION, FILED FEB. s, 1913.

1,396,048; Patented Nov. 8, 1921.

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F.-W. OSTROM AND I. F. WEBB.

FILLED SACK SEWING APPARATUS.

APPLICATION FILED FEB. a. 1918.

1,396,048. Patented Nov. 8, 1 921.

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1,396,048. Specification of Letters Paten Patented Nov. 8, 1921.

Application filed February s, 1918. Serial Nd. 215,997.

To all whom it may concern.

Be it known that we, F REELAND W. Os- TROM and IRVING F. lVEnB, citizens of the United States, residing. respectively, at Newark, in the county of Essex and State of New Jersey, and Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Filled-Sack-Sewing Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings. V

This invention relates to improved means for closing the mouths of filled sacks by a line of. stitches and for conveying said sacks in an upright position under and past a sewing machine supported by the main frame of the sewing and conveying apparatus.

The invention has for an object to lessen the cost of construction and to effect increased production by the employmentof an automatically controlled stitch-forming mechanism, provided with an emergency mechanism, and automatically controlled means for holding in register the means for controlling the stitching operation with re spect to the relative adjustments of the conveyer and the sewing machine.

The invention has for another object to provide a more conveniently operated appathe requirements of machines of the present character.

In the accompanying drawings, which form a part of the specification,

Figure 1 is a view in front side elevation of the present construction, the sideguide-bar, conveyer-frame and carrier-belts being slightly broken away. Fig.2 is a plan view of the present construction with a portion of the carrier-belts and table-top broken away for a better understanding of the means employed for automatically controlling the seam formation. Fig. 3 is a view in end elevation of Fig. 1. Fig. 4 is a v ew in elevation of the sewing machine belt-shifting and emergency mechanisms, as viewed in a direction opposite to that of Fig. 3, together with a portion of the sewing machine. Figs. 5 and 6 are views, in detail, of the right and left-hand carrier brackets, respectively, the former being shown in-section and the latter as a plan view. -Fig.

.7 is a detail view of a portion of the conveyer motor bracket, illustrating. the manner of securing it to the conveyer-frame. Fig. 8 is a fragmentary view of one of the power-transmitting trip-bars for controlling the .action of the stitch-formingmechanism and for suspendmg such action. F ig. 9 is a detail view of certain of the elements employed for actuating the carrier-belts, referred to later. F ig's. l0 and 11 are views in elevation of the means for automatically starting and arresting the seamfor'ming operation, including the emergency mechanism. Figs. 12 and 13 are fragmentary views of the emergency mechanism. Fig. 14 is a view in elevation of the electric switch-box.

eferring' to the drawings, the machine frame comprises the supportin standards or brackets 1 and 2 suitably secured upon the wooden base comprising the end pieces 3 and 4 and the tie-piecesfi, 6 and'7. Mounted upon said standards is the table 8 sup porting the sewing machine bracket 9,hav ing fixed to it the sewing'machine head 10. Upon a bracket 11 supported by said table is suitably secured an electric motor 12, controlled by the electric switch 12, said motor operating the sewing machine by means of the belt connection 13. As the stitch-forming elements herein employed are well known, it is not deemed necessary to specifically refer to the same.

The conveyer-frame 14 is secured at nearly its opposite ends by screws, as 15, to the conveyerframe brackets 16' and 17, secured by. screws, as 18,*to the sliding nuts 19 and 20, respectively, the tightening of the screws 18 effecting a sliding-fit between the surfaces 21 and 22 of the nuts 19 and 20, respectively. with the surfaces 23 and 24' of the standards 1 and 2, and between the surfaces25 and 26 of said standards and the surfaces 27 and 28 of the brackets 16 and'l'i, respectively:

The electric-motor 29 has driving connections with the carrier-belts 30 and 31. independent of the driving connections of the motor 12 with the sewing machine and is suitably secured upon a bracket '32 carried by the conveyer-frame 14, said motor being controlled by a switch located. in the switch-box-34.

Supported by the conveyer-frame 14 is a bracket 35,provided with shaft-bearings 36 and 37, and a bracket-lug 38. J ournaled in saidrbearings is the friction-clutch driving shaft 39, upon which is mounted a loose pulley 40, Carrying the cup-shaped disk 41, said pulley and disk beingv operatively connected by means of a belt 42 with the motor 29.

A cone-shaped pulley 43 is suitably secured on the shaft 39. to rotate therewith and is movable longitudinally thereon.

Upon the lug 38 .is fulcrumed a clutch-controlling lever44 acting, at the will of the operator and in opposition to the clutch-spring bracket ings formed in the frame 14. The shaft 53' carries the belt driving cylinder 54 provided with the rib 55 for directingthe belts 30 and travel, a like cylinder rib 55 being suitably.

31' in a given line of 56, provided with-ca journaled in the opposite end of the frame 14 andv acting as an'idler for the travel of said belts, which are supportedbetween said cylinders by rollers, as 57, except as noted later.

A rock-shaft 58 is journaled in suitable bearings formed in brackets, as 59, secured upon the frame-base-and to the forward end of said shaft is secured a bracket-arm 60,

carrying an operating lever 61, provided with a contact member 62. To resiliently hold the operating mechanism in the posi tion shown in Fig. 1 of the drawings,'the

' rock-shaft 58 has secured thereupon an arm 63 and a spring 64,-one end 65 of the latter bearing OIlztl'l tie-piece 7 and its other end 66 being in. contact with the arm 63, thereby forcing a stop-member 67 of the rock-shaft,

intocontact with the tie-piece 7. Secured upon the rock-shaft 58 is a crank-arm 68, linked at its free'end to' a chain connection 69 passing around an idler 69 and linked at its opposite end to an arm '70'projecting from a rocking standard 71, 'journaled at its opposite ends in bearing lugs, as 72, one of which is suitably secured to the under side of the table 8 and the other upon the tie-piece 5. The rocking standard carries a parallel.

bar 73 which, in practice, is adapted to act upon the lever 44 to move the clutch member 43 into engagement with the disk 41.

' To adjust the conveyer-frame 14 to meet the requirements of sacks of various sizes,

vertically arranged screw-rods 74 and-75 are threaded through the nuts19 and 20,

respectively. The screw-rods are 'journaled near their upper ends in suitable bearings as 76, (one only of which is,shown,.see 1?ig. 3), carried by the standards 1 and '2, and carry at their upper ends gearfmembers, as 77 (one only of whichv is shown) meshing with like'gear-members, as78, upon crank shafts, as 79, actuated by means of the crankmembers 30 to effect the desired vertical adjustment of said conveyer-frame.

Reterringnowto the means employed for controlling the stitching operation, a beltshifting bracket 81 is suitably secured to the sewing machine bracket 9 and is providedwith a lug'SZ Upon the free end of the lug is pivotally mounted a belt-shifting lever 83, pro- 'vided with beltfshifting fingers, as 84, a belt- 87, and a flexible-connection supporting and directing element 88. The power-transmitting and arresting trip mechanism preferably comprises bars 89 and 89', having oneof their ends,as 90, connected with a tripbar crank-arm t l'of one of the roller-rods,

pointed-screws, as93, secured against accidental movement by nuts, as 94. The other ends of thebars 89 and 894 are pivotally connected witha'crank-arm 96 on'the roller-rod 97, journaled in suitable bearings in the frame '14 and carrying at its inner end a flexible-connection actuating crank-arm 98, linked tc'one en-d of'a flexibleconnection 99.

capable of turning movement on i The flexible connection 99 passesover the element 86,- under the element 87 and'over the element 88-, where its free movement is ref led bya bent sprmglOO, passmgpartly over the element 86 and carried by a flexibleconnection adjusting lever 101 pivotally sup eorted .upon'the bracket 81. The lever 101 is formed at on 'end with an apertured ear 102 for the passage of the flexible connectlOIl' 99, --to"thef depending end. of which 1s attached a suspendedwe ght 103 actmgasa resistance member to the, rocking 'move-' ments oi the crank-arm 98, WlllCll movements are limlted in one dlrection by a stoprod'104, on the roller-rod 97. and a stopfinger'105 projecting from the frame 14.

Attached to the other arm of thelever 101 is a chain 106 forming a flexible connection with the free end'of a crank-arm 107, secured upon the rock-shaft 58. i v

- When the sewing and conveying mechanisms are stationary, with no bag upon the trip-bars 89 and 89, the parts are substantially in the position shown, particularly in Figs. 1 and of the drawings. In this position the operating lever 61 is held inclined'to theright under the action of the spring 64, thereby causing'the chain 106 to hold the long end of the lever 10 1 and 0011- sequently the weight or resistance member 103 in raised position, Which provides sufficient slack in the flexible connection 99 to permit the belt-shifting lever 83 to assume its stop-position under the action of the weight and also to permit the trip-bars 89 and 89 under their own weight to assume their lowered position in the space 108 provided for the purpose. 1

In operation, the adjustment of the switches 12 and 33 starts the motors 12 and 29, respectively. The movement of the operating lever 61 to the left (see Fig. 1) actuates the rod 73, thereby moving the clutchlever 44L, producing frictional contact between the clutch-members 41 and 43, and driving the shaft 39, which by means of the gear connections described transmits motion to the carrier-belts 30 and 31. The actuation of the rock-shaft 58 at the same time moves the crank-arm 107 to produce slack in the chain 106, permitting the lever 101 and the resistance member 103 to drop into the full-line position shown in Fig. 10. This movement takes up on the flexible connection 99, owing to the action of the spring thereon, sufiiciently to raise the trip-bars S9 and 89' into operative posit-ion, thereby rendering the automatic controlling means for the stitch-forming mechanism potentially effective, but not sufiiciently to lift the weighted end of the belt-shifting lever 83, owing to the greater inertia of the weight 85.

The carrier-belts 30 and 31 are now in operation, but the sewing mechanism is still stationary. By placing a bag Z) upon the carrier-belts in substantially the position in dicated in dotted lines in Fig. 2, the belts carry the same past the stitch-forming mechanism. In so doing, the bag contacts with and depresses the trip-bars 89 and 89, thereby actuating the crank-arm 98 to exert a pull on the flexible connection 99, pulling down the element 86 and consequently shifting the sewing machine driving belt from its loose to its tight pulley. The movement of the lever 83 at this time is due to the greater resistance of the weight 103. The shifting of the belt of course starts the sewing mechanism. After the bag is past the sewing mechanism and rides off the trip-bars 89 and 89. the weight 85 drops, disconnecting the driving means for thesewing mechanism, lifting the directing element 86 and consequently lifting the trip-bars 89 and 39. From the foregoing description it is apparent that the tripbars 89 and 89 and their connection with the belt-shifting lever 83 constitute automatic controlling means for determining the period of operation of the stitclrforming mechanism.

F or the ordinary running of the machine, the emergency mechanismcomprising the directing and frictioning elements for the fi s bl ceauesti a 9. beyond th ir c i g member 86 could of course be dispensed with, this mechanism being only provided to meet the requirements of accidental conditions such as for instance the breaking of the needle or thread during the sewing operation, in which case it is desirable to stop the sewing mechanism at any point during the stitching of the mouth of the filled sack. In such emergency cases when it is necessary to release the o crating lever 61 to stop the convcyer, before the stitching operation is comnleted, the sewing mechanism would continue in action, without the provision of an emergency stop mechanism. lVith the present device, in an emergency of the cha acter referred to. when the operator releases the operatin lever (31, the conveyer actuating mechanism is disconnected and the conveyer comes to rest. At the same time the rocking of the shaft 58 causes a downward pulling action upon the chain 106, thereby swinging the flexible-connection adjusting lever 101 on its pivot, causing the spring 100 to grip the flexible connection between it and the supporting and guiding element 88 and producing slack in the flexible connection 99. Inasmuch as the trip-bars 89 and 89 cannot take up this slack owing to their lowered position due to the weight of the bag upon them, this slack is taken up by the belt-shifting lever 83 under the action of the weight 85, thereby switching the sewin machine driving belt from the fast to the loose pulley and applying the brake 85 to stop the machine. started from this stopping positiointhe resistance member 103 drops downwardly owing to the slack produced in the chain 106 by the movement of the shaft 58, thereby taking up on the flexible connection 99 and consequently swinging the belt-shifting lever to starting position.

Having thus set forth the nature of the invention, what we claim herein is 1. In a filled sack sewing apparatus, in

combination, sack conveying mechanism, manually operated means for controlling the operation of said sack-conveying mechanism.

stitcl1forn1ing mechanism, work-controlled means whereby said stitch-forming mechanism is automatically brought into and normally maintained in operation for a definite period during the operation of said conveying mechanism, and an emergen mechanism adapted to be brought into action to-arrest and restore the operation of saizl stitch-forming mechanism during the normal operation-period of the latter.

2. In a filled sack sewing apparatus, in combination, sack-conveying mechanism, manually operated means for controlling the operation of said sack-conveying mechanism. stitch-forming mechanism, work-actuated mechanism in inoperative position during the inaction of the sack-conveying mecha- When the machine is again said stitch-forming mechanism and nism, and means brought into action by the starting of the sack-conveying mechanism to bring said work-actuated mechanism into eifective position for determining the period of operation of the stitch-forming mechanism.

3. A filled-sack sewing apparatus comprising stitch-forming mechanism, sack-conveying mechanism, manually operated means for controlling the operation of said sackconveying mechanism, automatic means for controlling the period of operation of said stitch-forming mechanism, and an emergency mechanism adapted to be brought into action to arrest and restore the effective action of said automatic controlling means.

4. A filled-sack sewing apparatus comprising stitch-forming mechanism, sack-conveying mechanism, manually operated means for controlling the operation of said sackconveying mechanism, automatic means for controlling the operation of said stitch-forming mechanism, and an emergency mecha nism adapted to arrest the effective action of said automatic controlling means.

5. In a filled-sack sewing apparatus, in combination, stitch-forming mechanism and sack-conveying mechanism, means for manually controlling the operation of said sackconveying mechanism, means brought into action by the conveyance of a filled sack by said sack-conveying mechanism to control the operation of said stitchforming mechanism and an emergency mechanism adapted to be brought into action by the controlling means for the conveying mechanism to stop said stitch-forming mechanism.

6. A filled sac-k sewing apparatus. comprising stitch-forming mechanism, sack-conveying mechanism, manually operated means for controlling the operation of said sackconveying mechanism, automatic controlling means for determining the period of opera tion of said stitch-forming mechanism, an emergency mechanism adapted to be brought into action to arrest and restore the effective action of said automatic controllingmeans, and means permitting vertical adjustment of said sack-conveying mechanism.

7. A filled sack sewing apparatus, comprising stitch-forming mechanism, a sackconveyer, automatic controlling means for determining the period of operation of said stitch-forming mechanism, means permitting relative vertical adjustment between said sack-conveyer. and an emergency stop-mechanism adapted to be brought into action to arrest and restore the effective action of said automatic controlling means and including a flexible connection one end only of which is connected with a member sustained by said sack-conveyer to provide for said vertical adjustment.

8.. A filled sack sewing apparatus, comprising stitch-forming mechanism, a sacle conveyer, automatic controlling means for determining the period of operation of said stitch-forming mechanism, and an emergency stop mechanism for said stitch-forming mechanism adapted to arrest and restore the effective action of said automatic controlling means, said emergency stop-mechanism including an operating member sustained by said sack-conveyer, a resistance member, and a flexible connection between said operating member and said resistance member.

9. A filled sack sewing apparatus, comprising stitch-forming mechanism, a sackconveyer, automatic controlling means for determining the period of operation of said stitch-forming mechanism, and an emergency stop-mechanism for said stitch-forming mechanism adapted to arrest the effective action of said automatic controlling means, said emergency stop mechanism including an operating member sustained by said sack-conveyer, a resistance member, a weighted belt-shifting member, and a flexible connection between said operating member and said resistance member.

10. In a filled sack sewing apparatus, in combination, stitch-forming mechanism, a sack-conveyer, means for vertically adjusting said sack-conveyer, and an emergency mechanism adapted to be brought into action to control the operation of the stitchforming mechanism, said emergency mechanism including a resistance member selfadjustable in accordance with different adjusted positions of the sack-conveyer.

11. A filled-sack sewing apparatus com-- prising a sack-conveyor, an operating lever permitting manual control of the operation of said sack-conveyer, stitch-forming mechanism automatically operated by the conveyance of a filled sack by said sacleconveyer, and an emergency stop mechanism adapted to arrest and restore the operation of said stitch'forming mechanism by the movement of said operating lever to stop and start, respectively, the operation of said sack-conveyer.

12. In a filled-sack sewing apparatus, in combination, a sack-conveyer, stitch-forming mechanism and an emergency stop mechanism, manually operated means for starting and stopping the operation of said sackconveyer, controlling means normally in inoperative position and adapted to be placed into operative position by the starting 0]": said sack-conveyer for automatically determining the period of operation of said stitch-forming mechanism by the conveyance of a filled sack by said sack-conveyer, and a connection between said emergency stop mechanism and said controlling means whereby the operation of said stitch-forming mechanism is arrested and restoredby the actuation of said manually operated means to stop and start the operation of said sackconveyer.

13. In a filled-sack sewing apparatus com prising stitch-forming mechanism, a sackconveyer, a support for said sack-conveyer, automatic controlling means sustained by said support for determining the period of operation of said stitch-forming mechanism and normally out of operative position, and means brought into action by the starting of said sack-conveyer for placing said automatic controlling means into operative position.

14. In a sewing machine, in combination, stitch-forming mechanism, a belt-shifting lever, means for normally holding said beltshifting lever in position to render said stitch-forming mechanism inoperative, automatic controlling means including a flexible connection for moving said belt-shifting lever to start said stitch-forming mechanism and determine its period of operation, and means including a suspended resistance member to arrest and restore the operation of said stitch-forming mechanism While under the action of said controlling means.

In testimony whereof, We have signed our names to this specification.

FREELAND IRVING F. 

